One-to-one, many-to-one or many-to-many relationship management in the new cockpit v2

I have a question about how to use the tool, how I could implement fields with a one-to-one or many-to-many relationship taking into account that the database structure that is managed is non-relational, how I could create a customer model and be able to relate a customer model to it. Vehicle created from another model so that both are linked and thus be able to make queries to bring all the data of the client’s vehicle?